Question

PLEASE DO THIS WITH PYTHON!

Please do this with PYTHON!

Assume the example of a name list for all problems below (use it as a line in your code) e.g. nameist -ll'Julia Truong'.'Chen Wu'vJeb Castro,'Ron Kennedy', 'X YI 1. Write a recursive function convertNames0 to accept the initial nameList and return a new list containing only first names. Provide function call and print the resulting list after the function had returned the results. (solution similar to problem on the slide 13 for Chapter 11) Result should be: l'Julia'.'Chen','Jeb','Ron','Xl 2. Write a recursive function chooseNames0 to accept nameList and return a new list only with names starting with 'J' Provide function call and print the resulting list after the function had returned the results. (solution similar problem on slide 15 for Chapter 11) Result should be: ['Julia Truong' 'Jeb Castro'] 3. Write a recursive function countNames0 to accept nameList and return a number (count) of first names starting with 'J'. Provide function call and print the result after the function had returned the result. (solution similar to problem on slide 17 for Chapter 11) Result should be: 2

Answer 1

Part 1)

Code:

def convertNames(l):
    if l==[]:
        return []
    else:
        first=l[0].split(' ')[0]
        return [first]+convertNames(l[1:])


nameList=['Julia Truong','Chen Wo','Jeb Castro','Ron Kennedy','X Y']
print(convertNames(nameList))

Output:

Part 2)

Code:

def chooseNames(l):
    if l==[]:
        return []
    else:
        start=l[0][0] # Initialising first character of first name of list
        if start=='J':
            return [l[0]]+chooseNames(l[1:]) # when name start with 'J'
        return chooseNames(l[1:]) # when name does not start with 'J'

nameList=['Julia Truong','Chen Wo','Jeb Castro','Ron Kennedy','X Y']
print(chooseNames(nameList))

Output:

Part 3)

Code:

def countNames(l):
    if l==[]:
        return 0
    else:
        start=l[0][0]
        if start=='J':
            return 1+countNames(l[1:])
        return countNames(l[1:])

nameList=['Julia Truong','Chen Wo','Jeb Castro','Ron Kennedy','X Y']
print(countNames(nameList))

Output: